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1930s British piston aircraft engine
The Wolseley Aries III or A.R.9 was a British nine-cylinder, air-cooled
radial
aero engine that first ran in 1933, it was designed and built by
Wolseley Motors . Intended for the military
trainer aircraft market few were produced as Wolseley
withdrew from the aero engine market in 1936.
A larger
capacity version was known as the Wolseley Scorpio . Further-enlarged versions, the Leo and Libra , were test run but did not fly.
Variants
A.R.9 Mk I
203 horsepower (151 kW).
A.R.9 Mk II
205 horsepower (153 kW). Higher permissible rpm version of Mk I.
A.R.9 Aries Mk III
225 horsepower (168 kW), low boost
supercharger fitted.
Scorpio I
250 horsepower (186 kW), (230 bhp at 2,250 rpm), increased
bore (111mm x 120 mm) to give a displacement of 9,477 cc,
[1] increased
compression ratio . Reduction gearing.
Scorpio II and III
250 horsepower (186 kW), designed to run on 87
octane fuel with 6.5:1 ratio.
[2]
Leo
280 horsepower (209 kW), few details, not flown or produced.
Libra
390 hp at 6,000 ft.
[3] 725 lbs (329 kg). Tested but not flown or produced.
Applications
Specifications (A.R.9 Aries Mk III)
Data from Lumsden
[4]
General characteristics
Type: 9-cylinder, single row, radial engine
Bore : 4.19 in (106 mm)
Stroke : 4.75 in (120 mm)
Displacement : 588.6 cu in (9.654 L)
Length: 42 in (1,067 mm)
Diameter: 41.25 in (1,048 mm)
Dry weight : 510 lb (231 kg)
Components
Performance
See also
Comparable engines
Related lists
References
Notes
Bibliography
Lumsden, Alec. British Piston Engines and their Aircraft . Marlborough, Wiltshire: Airlife Publishing, 2003.
ISBN
1-85310-294-6 .
External links